Contour surface grinder



Sept. 12, 1933. c, KNOWLES CONTOUR SURFACE GRINDER 1931 4 Sheets-Sheet 1 Filed Nov. 23

INVENTOH CA EEOLL. Kvo W1. 53 B Ar mwsr Sept. 12, 1933. c. KNOW ES CONTOUR SURFACE GRINDER 4 Sheets-Sheet 2 Filed Nov. 23

INVENTUH CAEEQLL. KNOM/L. 5'

477 HNEY Sept. 12, 1933. c, KNOWLES CONTOUR SURFACE GRINDER 1931 4 Sheets-Sheet 3 Filed Nov. 23

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A770 IVE) CAEEOLL. Kvo Br Sept. 12, 1933. c. KNOWLES CONTOUR SURFACE GRINDER Filed Nov. 23, 1951. 4 S ee s-Sheet 4 IN VE N 7'0]? L r W N O M/ H L w 7 Q m secured in positions for the grinding operations. In the illustrated form of the invention the table 11 is shown as of the horizontal reciprocating type, the means for reciprocating the table not being shown as they form no part of the present invention. Mounted along one side of the fixture 12 on the table 11 and fixed thereto is a cam 13 preferably extending parallelly thereof substarge, tially the entire length of the table 11. The upper surface of this cam 13 has any predetermined contour. The purpose of this camwill be presently explained.

Upon an extension of 1 the'base 10 preferably in rear of the table 11 is mounted a wheel head 14 13 in which is rotatably mounted a rearwardly extending horizontal wheel spindle 15. On the forward end of this spindle 15 is secured an abrasive wheel 16 overlying the work supporting portion of the table 11 and adapted to engage work 23 mounted on said table upon its periphery. ,The

spindle 15 is mounted'in spaced bearings 17 within wheel head 14 and is adapted to be rotated by any preferred means such as a multiple grooved pulley 18 upon a rearwardly extended portion of 23 the spindle 15. If desired the, spindle 15 and wheel 16 may be reciprocated a short distance axially of the spindle 15 to improve the action of the wheel 16 and to eliminate scratches or wheel zimairrsgvp.

j' endgof the spindle 15.; This mechanism is-not *shown'but may be-claimed in another applica- 9 "tibn. Itwill suflice'to state that the spindle15'is If; somounted within its bearings 1'7 that it is free to" move axially limited distances under the con- ,trol fthe lev r I 7 The wheel head f is fpivotally mounted upon a "shaft 20,mounted my bosses or extensions of the extensions and atits ends may have antir ction bearings 21 thereon mounted in portions" j 'ofthe wheelhead 114 and upon which the wheel headrnay freely oscillate. The wheel spi n dle 15- "lower the work I ngaging surface of the-wheel: 16 1 el atiye to thegworklti onthetable 11.

and pivot shaft isa supplementary or interover ,a substantialfangle. a En a n t e tgethrh jad justmentbetween the oscillatory members is "i il k n Mea to r t e jt s haf 2 m 5 15 "f just the relative positions of the wheel headl4 which the peratof may oont'rolth "and supplementary member 24 will presently 'be' scribed. Mounted on the supplementary m em any desired forrn of feeding meehanisrn l t orextending hori'zontally and rearwardly*within fofff6f oiihterbalanee.-*-'This eoifiiterbalaning above its pivot. Similarly this adjustmentof the "the supplementary member 2 4,

. t a Ih sv e han' mm x d e ii ated fromallever 19'pivotally mounted on the 'f the'p' vv head 14 and attached to the rearward extended WqThe p'ropo'rtions'ofthe supplem ".Piro al' r me n ed upon the heelh i termediatepoint between the wheelspindle l5" ZB'isa'worm 27 onthe'lower end of a shaft 28' b fl ia f t we bpi it andfipt jh a e r t 2 v an segment eaf,ieet ef' l f "355 1129 rotatable freely upqna'short shaft" or stud 3U empl edito' take uppart oflthi'sweight by 'sbjme I the member 24. This roller 29 engages the upper contoured surface of the cam 13 extending longitudinally of the table 11 and oscillates the supplementary member 24 and also the wheel head 14 in accordance with the surface of the cam. To efl'ect' feeding movements of the wheel 16 and to adjust the position of the wheel as it becomes reduced in diameter the worm 27 may be rotated to oscillate the head 14 downward with respect to the supplementary member 24. With the ro1ler29 in any position on the cam 13 the wheel position toward and from the work W on the table 11 may therefore be changed.

As the head 14 is oscillated downward to ad- 'just the wheel 16 for different thicknesses of work and for. the decreasing diameters of the wheel its point of contact with the work W moves laterally toward the left, as viewed in Fig. 4. This isfor the 'reason that the spindle 15 is obliquely wheeljlfi by oscillationof thewheelheadjll varies the position of the supplementary men lb er 2,4 which also is oscillatedby this adjustmentlaboiit its pivot 25. Any adjustmentof the wheel head 14 varies the position of the pivot shaft 25 for By, virtue I of this oscillation of t he supplemnta member and s a finalher the o qn o i -PiYQt 2 9 a .mere e qnsh w re 1t determinesthe lateral'rnovern en er -29 and ginsi e "in? F 51 i ii bi d me stahtia lly equals the I lateralfmovemenb 6f "the v h e s' t'ja l. a es; tg n ait t wfieiel head? "Thelongitudinalrelationship of he cam 13 androller 29 and'that of the wheel 16 and work -jd am g pious cillat'ionof the or estimated 555115161; t {head. emf L ship will be n'laiiatained; Centr'line] r'iFig. 4 indicate sftliat meme maximum diameter-pf wheel I g V a 16 the ax's'of thespindle15 i' 'd'r''ctly over'the "isdisposed at a material distance laterally from" H the pivotal shaft zd so that oscillatory movements 7 {of the head14upon this-shaft 20 will raise and "adjust t'he 'ptititit 'd'the'uppe'rf-end of 1 ediate' member 2 4. Thepivot for thismemberf the'shaft 28 jipohflwhicht'h vor'in is'r'nounted has 24fis' in the form of a shaft 25 extending paral- {lieyedtheret o p 1 l'elly to'the pivotal'shaftgq for the head This th is geaiq 32'jis anot erg' ar'eg 1supplementary' mernber 2 1s provided with gear I te eth 2 6 at a portion of its periphery extending;

the wheel- 16-oi-the shaft may ,c attached I to er"; td liiriitj thew i hfti qr the "wheel "head 14 againstthe workW and cam 13 'r'nean s" maybe means may be seen in Figs. 2 and 5. A vertical rod 45 is attached at its upper end as by means of a short pin 46 mounted-within the member 24 and which passes through an opening through the rod. The rod 45 passes downward, its lower end being housed but freely movable. within a sleeve 4'7. Surrounding the rod 45 is a helical spring 48 the lower end bearing against a shoe 49 and the upper end being adjustably mounted by a collar 50 on the-rod45 against whichthe spring 48 directly bears. A threaded nut 51 in contact with the collar 50 enables the, spring 48 to be adjusted as to length.- The shoe 49 bears against the upper surface of the fixed sleeve 47, the weight of the head 14 and parts mounted thereon compressing the spring 48. The com pression of the spring 48 is not sufficient to lift the roller 29 from the cam, 13 but supports a portion of the weight of these parts upon the sleeve 47 fixed within the base. The amount of weight supported by the spring 48 may be regulated by adjustment of the nut 51 downward 1 along the rod 45. A threaded collar 52 may be adjustably positioned upon the lower end of the, rod 45 to limit the maximum extension of the spring 48.

In operation and with work pieces .W' suitroller 29. The eifect of the cam 13 is to raise and lower the roller 29 in accordance with its upper surface and the intermediate member 24 upon which the cam 13 is mounted. This movement of the member 24 also induces-oscillatory movements of the wheel head 14 and wheel 16 about the pivot shaft 20. The effect of this movement of the wheel 16 is therefore to engage the work pieces W' and grind a contour thereon corre-' sponding to the surface of the cam 13 engaged by the roller 29.

i What I claim is: a

l. A surface grinding machine comprising in combination, a base, a work supporting table movable thereon, a cam movable with said table, two relatively adjustable members pivotally connected to each other one of which is pivotally mounted upon said base, a cam engaging roller on one of said members, andan abrasive wheel rotatably mounted on said other member, whereby during operation of said table said wheel may be oscillated toward and from said table by said cam and the relative vertical positions of said wheel and roller may be varied while the longitudinal positions of said wheel and roller are not varied.

2. A surface grinding machine comprising in combination, a base, a work supporting table movable thereon, a cam movable with said table, two relatively oscillatory members one of-which is pivotally mounted uponsaid base, a cam engaging roller on one of said members, and an abrasive wheel rotatably mounted on said other member, and self-locking means for adjusting the relative oscillated positions of said members whereby during operation, of said table said wheel may be actuated toward and from said table by said cam and the relative vertical positions of said wheel and roller may be varied roller are not varied. 1

3. Asurface grinding machine comprising in combination, a base, a work supporting table movable thereon, a cam movable with said table, two relatively oscillatory members one. of which is pivotally mounted upon said base, an abrasive wheel rotatably mounted on said member pivoted to said base, a cam engaging roller on the other member, and self-locking means for adjusting the relative oscillated positions of said members whereby during operation of said table said wheel may be actuated toward and from said table by said cam in different adjusted positions of said oscillatory members while the longitudinal positions of the wheel and roller remain unchanged.

4. A surface grinding machine comprising in combination, a base, a table movable thereon, a cam movable with said table, a wheel head having an abrasive wheel rotatably mounted therein pivwhile the longitudinal positions of the wheel and otally mounted on said base for movement toward v and from said table, andan intermediate member pivoted to said head and engaging said cam wherebyoscillation'of said intermediate member by said cam will oscillate said wheel head.

5. A surfac e grinding machine comprising in combination, a base, a table movable thereon, a

cam movable with said table, a wheel head having an abrasive wheel rotatably mounted therein the position of said wheel toward and from said table and the position of the wheel relative. to

the roller.

6. A surface grinding machine comprising in combination, a base, a table reciprocable thereon,

of said head and intermediate member to vary a cam extending longitudinally of said table, a 7

wheel head having an abrasive wheel" rotatably mounted therein. pivotally mounted on said base whereby oscillatory movements of said head will 7 move said wheel toward and from said table, and an intermediate member pivoted to said head upon an axis parallel to the axis of oscillation of ment of said table and cam will oscillate said wheel toward and from said table, and means to adjust the relative positions of said head and intermediate member to vary the position of said ,said head and engaging said cam whereby movehead relativeto said table to effect feeding movements of said wheel toward said-table and to adjust for different sizes of wheels.

7. A surface grinding machine comprising in combination, a base, a work supporting table movable thereon, a cam extending along said table, a wheel head having an abrasive wheel rotatably mounted therein pivotally mounted on said base, an intermediate member pivoted to said head and having a roller engaging said cam,

andmeans to adjust the relative positions of said head and intermediate member to vary the posi- 

